Governor mechanism for pneumatic musical apparatus.



J. P. EUSTIS & A. T. BROWN.

GOVERNOR MECHANISM FOR PNEUMATIC MUSICAL APPARATUS.

APPLICATION FILED MAY 8. 1913.

1, 165,081 Paten-ted Dee. 21, 1915.

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J. P. EUSTIS @L A. T. BROWN.

GOVERNOR MEOHANISM FOR PNEUMATIC. MUSICAL APPARATUS.

APPLICATION FILED MAYB, 1913. 1,165,081.

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J. P. EUSTIS & A. T. BROWN.

GOVERNOR MECHANISMFOR PNEUMATIC MUSICAL APPARATUS.

APPLICATION HLED MAYB. 1913.

1,165,081, Patented Dec. 21, 1915.

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JOI-IN P. EUSTIS, OF NEWTON, ANDALBERT T. BROWNQOE ARLINGTON, MASSACHU- SETTS, ASSIGNORS TO J. P. EUSTIS MANUFACTURING COMPANY, OF BOSTON, MASSACHUSETTS, A CORPORATION OF MAINE.

GOVERNOR MECHANISM POR PNEUMATIC MUSICAL APPARATUS.

Application filed May 8, 1913.

To all whom t may concern Be it known that we, .loi-IN P. Ensiis and ALBERT T. BROWN, both citizens of the `United States of America, residing, respectively, at Newton, county of Middlesex, and State ofL Massachusetts, and Arlington, county of Middlesex, and State of Massachusetts, have invented certain new and useful Improvements in Governor Mechanism for Pneumatic Musical Apparatus, of which the following is a specification.

This invention relates to governor mechanism for controlling the motors of pneumatic musical apparatus, and whereby the tempo of the piece of music to be produced may be varied. `Incidentally thereto, the inventioii relates to the means for stopping the motor and means for producing the rewind of the perforated music sheet.

Among the objects of the present invention are, first: the arranging ofthe parts so that they shall be compact and occupy as little space as possible; second: the improvement of the valve mechanism, including the valve seats so that the mechanism will be sensitive to the atmospheric tensiony produced therein; third: the construction of the various chambers ofthe apparatus of metal, such as high brass; fourth: the provision of absolutely leak-tight joints; and lifth,the increased efficiency and durabilityy of the parts of the apparatus. These being among y the objects of the present invention, the same consists of certain features of construction and combinations of parts to be hereinafter described and then claimed with reference to the accompanying drawings illustrating a suitable embodiment of the invention, and

in which Figure 1 isa sectional front elevation of so much of the mechanism as is requisite for illustrating the present invention; Fig. 2 is a sectional plan in which the motor is omitted; Y.

illustrated in Fig. 1 as viewed from the right Specification of Letters Patent.

Patented Dec. 21, 1915.

Serial No. 766,279.

of said figure, and Fig. 10 is a detail perspective View of a valve guide member.

Referring to Fig. 1, a portion of the wellvknown pneumatic motor 1 is illustrated, the

same being supported by a standard 2 and a suction pipe 3. The pipe 3 is, by means of an elbow 1, connected with the trunk pipe 5 of the motor. In the present invention the governor box 6 is arranged underneath the motor and is provided at its inner end with a socket 7 which'receives the lower end of the motor standard 2, which is secured by a set screw 8. rThe suction pipe 3 has at its lower end an elbow 9 which is inserted within an annular flange 10 surrounding an opening 11, the connection being air tight. A suction pipe 12 is connected with the pumping belf lows (not shown) and is provided with an upturned end 12a, the upper end of which is board of governor pneumatic 13. The movable board or leaf of the vsaid pneumatic carries an automatic cut-off or Vregulator 14C for controlling the tension producedv in said pneumatic.

Governor vpneumatic lconnects by means of a pipe 15 with a metallic valve box 16 arranged below the governor box 6 which is also metallic, and said valve box provides a chamber 16a, and at one end is provided with an opening 16b in'its bottom. A hollow metallicshell 17 arranged between the valve box 16 and the governor box 6 provides an intermediate chamber 18, said shell being provided with side flanges 17a which are securedair-tight to the bottom of the governor box 6. rTempo slide rod 19 is arranged and guided in said governor box Gland is adapted to adjust a valve such as 2O in a well-known manner. Preferably the underside of the slide valve 2O is provided with. a felt facing 20a, and said valve is connected with the rod 19 as by means of a coupling device 21 which may be of any suitable construction.

At the respective ends of the governor box 6" are metallic bushings 22, 23, in which the slide rod 19 vis guided. The bottom of the metallic governor box 6 is provided with anf :y

elongated valve controlled opening 24 extending in the direction of movement ofl the tempo rod 19, and the said valve opening is so formed and constructed as to provideY for nicety of lit and tempo control. Tothis enden the Seid valve Opening ed is drifted directly into the metal of the governor box bottom,

and is smaller at one end than at the other,V

f its smaller end corresponding to a slow time I of the motor.

and its larger end to a quick time movement ofthe motor, and hence the perforated sheet of music (see Fig. 3). The said valve opening tapers from its smaller end toward its larger end, there being a gradual taper 24a from its smaller end for a considerable portion of the length of the valve opening or slot, and the wider portion of the opening or slot 24Vb being of marked widene'ss as compared with the narrower portion .24, and the said portions 24aand 24b being connected by amore abruptlytapered portion 24C. Obviously the narrower portion 24a of the valve opening provides for a more gradual accelerated movement of the motor, while the wide portion 24b provides for a more or less sudden accelerated and increased rmovement struction is such that the felt facing of the valve 20 seats lushv upon the metallic edges surrounding the valve opening 24, and obviously these edges can be ground and rounded off so as to reduce any burning or vibratory noises such as whistling, which might otherwise occur. The ends of the Vgovernor box 6 are `sealed air-tight by means of metallic disks or caps 25, provided with inturned flanges 26 which are fitted .snugly into the ends of said box. i

Shell l7fbe'liore mentioned is provided at one end, preferably just beyond the enlarged end of the valve controlled opening24, with a downwardly extending neck 27 Figs. 1 and 7, surrounding an opening or portr 28-and inserted yinto an opening in the top of the valve box, with which box the pipel communicates. The said opening or port 28 is under the vcontrol of a valve 30 which is provided with a valve stem 31, which may be actuated in a well-known manner by the difference in the tension on opposite sides ol a diaphragm 32, so as to open or close said valve against valve scat 29 formed by the protruding end ofV the neck 27. Said diaphragm 32 is arranged in achamber 33 which is formed by two concave or bulging metallic shells 34 and 35, which clamp and secure the edge of said diaphragm in air-- tight manner.

It will be seen `that the con- L bottom.

These spider arms37 are tends from the .shell 34, which neck is inserted Vin an opening 16h in box 16. The shoulders or abutments 3 8 will spring under the inner end of the neck 39 and the shoulders or abutments 37"L willsp'ring in contact with the outer end of said neck,- whereby the guide member consisting votsleeve 36 and its arms will be securely-held in central position for guiding the valve stem 31.

A tube 40 preferably of metal leads from a well 40a struck up from the bottom of the diaphragm chamber 33 to the outer air in a' vwell-known manner. trolling the admission of air at atmospheric vpressure to the said tube 40rneed not be The means for conshownk as it is so well-known, it being usually controlled by a valve operated by a push-button, `adapted when pressed to stop the motor. v f

Box 16 before mentioned and another 1ne-. f tallic box 41, are arranged transversely of* the governor box'6 and underneath the same, the box 41 being locatedV to the right of the box 16 and adapted when short-circuited to the bellows to rewind the music sheet quickly. (See Figs. 1, 5 and 6.)V The saidv box 41 forms a chamber 41a, `and said box is further provided with an opening 41b in its Suction pipe 12 passes through the opposite walls of the metallic box 41 and is provided with a side opening 421er establishing direct connection between the said pipe and the chamber 41a. Y

-At the openingsin the walls of boxv 41 throughfwhich said pipe 12 passes, are outwardly extending flanges 4.3 'which surround the said pipe 12 andare secured theretovin air-tight'manner. For the purpose of -securing the box 41 to the governor box 6, the

latterris provided with an'opening intoY which is inserted a neck 44 extending from said box 41 and surrounding a valve opening or port 45, the end of said neck being suiliciently projected or protruded to form a valve seat 46. Y c

A' valve 47 is adapted to work against said seat 46 and open or close as desired said port 45, and said valve is provided with a valve stem 48 which is `'guided in a guide member 49 which is in allV substantial respects similar to the guide member 36, 37 before described. Guide' vmember '49 -is sprung into opening 41b referred to. It will be seenthat the valve 30 Yworks toward the governor box 6 to close its'port, while the valve 47 works in a directionaway from said box to close its port. Thestem of va-lve 47 is operatively connected with flexible diaphragm 50 located in chamber 51 formedby two concave oir-bulging metallic shells 52 diaphragm is secured in air-tight manner.

VThe box 41 is closed vat one end by means of an end cap 54 provided with a flange 54b whichV is set. into and secured in said box and 53, between the edges of which the said end, said cap being in all substantial respects similar to the end cap 54a of valve box 16. At the other end of the metallic box l1 is a transparent pane 55 vwhich is secured between an inner flanged ring 56 and an outer ring 57, the said pane being secured in the box in an air-tight manner by means of said two rings. At the front end of the valve box 16 are rings 56a and 57a between which is confined in air-tight manner a transparent pane 55, said parts being substantially identical with the front end of the boxdl.

A rewind valve 57a is provided which ismounted on an arm 58 carried by a rockshaft 59, mounted on supporting bracket 60 which is carried by the supply-pipe 12, said valve serving to close valve orifice or port 61 in a well 62 at the bottom' of the chamber 51. Said rock-shaft 59 is operatedl in a. wellknown manner for the purpose of enabling the rewind of the music sheet to vbe performed by the apparatus. Extending from the well 62 is a tube G3 which is connected Y with an exhaust apparatus, so that the same tension of rarefied air is produced at opposite sides of the diaphragm 50.

On one end of the governor box 6 is located a relief valve Gi and this is wellthe same way by frames which are secured to the supporting member by means of screws so that the said panes can be removed for the purpose of obtaining access to any internal'part which the observer finds not working correctly. All of the joints in the apparatus are'made air-tight and the metallic parts are made airtight by solder or brazing.

The general operation of this sort of apparatus is well understood. BrieflyV described it is as follows: yIn playing a piece of music, the motor 1 is driven through the medium of air exhausted therefrom and which flows from the motor, through pipe 3, into the governor box 6, through the valve aperture 24, which may be throttled more or less by the valve 20, through vthe chamber 1S, into valve box 16, through pipe 15, into the governor pneumatic 13 and through the suction pipe 12, whichL is connected with the air exhaust apparatus. Obviously. the motor will be stopped when atmospheric air is admitted through tube LIO, which thereby raises the diaphragm as the air tension will Athen be greater on that side of the diaphragm than on the valve side, whereupon the valve 30 closes its port. The reversing gear (not shown) is then actuated so as to change the direction of movement of the music Sheet and the motor, and the low tensionV air supplied through pipe 12 will be short-circuited in the following order: Through the pipe 3, the corresponding end of the governor box 6, through port 45 andy through opening 41 in the pipe 12. Of course.I in order to establish this short-circuit, the rewind valve 57 must be opened to atmospheric pressure, whereby the valve 4:7

` is moved from its seat. The described parts movement of the motor, and for efectuating relatively to such accelerated movement a more suddenly proportioned and less gradually accelerated and increased movement, one of saidl air chambers containing a slide valve and another a plunger valve, and an elongated shell, at the top and bottom of which theseats for said valves are respectively located.

2. In governor mechanism for pneumatic musical apparatus, a metallic governor box provided in one wall with an elongated valve orifice extending longitudinally thereof, an elongated metallic shell covering said orifice, means for supplying a tension through said orifice and shell, and a slideyvalve controlling said orifice to vary'said tension.

3. In governor mechanism for pneumatic musical apparatus, a metallic governor box having a` lateral valve seat and comprising a hollow elongated tubular portion and metallic end caps, each having a stiffening flange inserted and secured air-tight in the end of said tubular portion'. l

4. In governor mechanism for pneumaticr musical apparatus, a governor box having a lateralvalve seat and comprising a hollow tubular portion and end caps, each having a stiffening flange Joined air tight with the end of said tubular portion.

5. In governor mechanism for'pneumatic musical apparatus, a metallic governor box having a lateral valve seat and comprising L a hollow tubular portion and end caps, each vhaving a flange inserted and secured aira valve therein,a chamber-.intermediate of :said boxes, one wall of which has a necklsurrounded orifice, said neckvbeing insertedV air-tight into said valve box, and a valve seat for said valve formed by the protruding edge of said neck.

7 In governor mechanism for pneumatic musical apparatus, a governor box provided withY a valve controlled orifice, a metallic valve box, a valve therein, a chamber intermediate of said boxes and provided with metallic walls, the latter having a necksurrounded orifice, said neck being inserted air-tight into said valve box, and a valveseat for said valve, formed by the protruding edge of said neck.

8. In governor mechanism for pneumatic musical apparatus, a governor box provided with a valve-controlled orifice, a valve box, a valve therein, a' chamber intermediate of said boxes and having a'iieck-surrounded orifice, said neck being connected air-tiglit with said valve box, and a valve seat for said valve formed by the protruding edge Y of said neck. i

L10. In apparatus of the character described, the combination of a governor b ox, avalve box communicating therewith to one side thereof and having an opening on that side remote from said governor box, a guide fitted into said opening friction tight, and a valve provided with a stem guided in said Vguide Aand adapted to control the communication between said two boxes.

,11. In apparatus of the character'described, the combination of, a sheet metal box, a tension pipe extending through openings in said box and having an opening communicating with the interior. of said box, and flanges struck upfrom said box, at

said openings thereof, and surrounding andforming air-tight connectionwith said PPe- .l

12.- Inl governor mechanism for pneumatic musical apparatus, the combination of a governor box, a box having'a neck inserted into an opening in said governor bo'x and forming an air-tight connection, the end of said neck providingV a valve seat, and a pneumatically controlled valve for acting against said seat.

18. In governor mechanism for pneumatic musical apparatus, the combination of a governor box, a metallic box having a neck inserted into an opening in said box and formving an vair-tight connection, the end of said lneck providing a valve-seat, and a pneumaty icallycontrolled valve `for acting against said seat. n

14. In governor mechanism for pneumatic musical apparatus, the combination of a gov-. ernor' box, boxes arranged Ltransversely thereof and connected therewith, means for supplying tension through all of said boxes,

and valves for controlling the connection of said transverse boxes with said governor box.

15. c In governor mechanism for pneumatic musical apparatus, the combination of aY metallicgovernor box, metallic boxes arranged transversely thereof and Vconnectedtherewitli, means for supplying tension through all said boxes, andvalves for controllingthe vconnection of said transverse boxes with said governor box. c

16. In Vapparatus of the character described, the'combination of a wind-chest, aV

`chest, a tempo governor separate from said wind-chest and comprising a govei'norbox parallel with said wind-chest, a pneumatic arranged horizontally on top of said governor box, and valves associatedV with said box and pneumatic, all of the said'parts of said governor being located above said windchest, between it and said motor, the said valves of said governor being disassociated from said wind-chest, and means for supporting said governor. and said motor in said positions.

18. In yapparatus of the character described, the combination of a governor box, governor pneumatic exterior torsaid box, valved connections-between said box and pneumatic but extraneous to said box, conducting meansextraneous to vsaid box for exhausting air from said pneumatic, and a separate valve outside of said valved connections and operated by said pneumatic for opening or closing the connection between saidv extraneous conductingY means and said pneumatic. Y v 4 19. In apparatus of the character described, the combination of a motor, a governor'box, a governorV pneumatic exterior to said box, valved connections between said box, pneumatic and motor, a conduit from said pneumaticand which is extraneous tov Y said boX, a Valve operated by said pneumatic for opening or closing the connection between said conducting means and pneumatic, and a direct Valve controlled connection between said conduit and motor when the first said Valved connections are rendered neutral.

20. In apparatus of the character de scribed, the combination of a governor boX, an exhaust pipe adjacent to it, a bracket on said pipe, a rotary Valve shaft journaled in said bracket, a valve for said boX controlling a passage to said pipe, a diaphragm chamber the diaphragm of which operates said valve, and a Valve operated by said shaft to admit atmospheric air past the same to move said diaphragm.

JOHN P. EUSTIS. ALBERT T. BROWN. Witnesses:

EDWARD WV. CASEY, EVA M. GOTT.

Copies of this patent may be obtained for ive cents each, by addressing the Commissioner of Patents, Washington, D. C. 

